1928 Cell Phone: Time Traveler?

In a silent film from 1928, a woman has been spotted talking on a cell phone. The film was made by Charlie Chaplin.
It's shocking to see a woman talking on her cell phone while walking down the street in such an old movie. There were no cell phones in 1928 and the woman is clearly talking and holding something next to her ear. Is she a time traveler?

Has the video been investigated? Is the woman really talking on a cellphone in the 1928 Charlie Chaplin movie?

The filmmaker who claims to have found evidence of real time travel in a 1928 Charlie Chaplin film is from France.

Charlie Chaplin's "The Circus" is the movie that features the time traveler.
In the late 1920s, Chaplin was nominated for an Academy Award for acting, writing, directing and producing "The Circus," but he was taken out of the running and presented with a "Special Award" instead.

In my opinion, she's not really a time traveler and she's just using a hearing aid. Small aids would have been available during this time period, so it's likely that that's what she was holding up to her ear. Although that doesn't explain who she's speaking to.

Here's the video of the 1928 film that features the woman and the cell phone.